https://code.blinkace.com/pdw/iftop/-/commit/77901c8c53e01359d83b8090aacfe62214658183
https://bugs.gentoo.org/857837

From: Paul Warren <pdw@ex-parrot.com>
Date: Wed, 3 Oct 2018 18:02:36 +0100
Subject: [PATCH] Support scales beyond 1Gbps
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Guido Jäkel <Guido.Jaekel@GMX.DE>
--- a/ui.c
+++ b/ui.c
@@ -71,7 +71,7 @@ int dontshowdisplay = 0;
 
 /* Barchart scales. */
 static struct {
-    int max, interval;
+    long max; int interval;
 } scale[] = {
         {      64000,     10 },     /* 64 kbit/s */
         {     128000,     10 },
@@ -79,7 +79,9 @@ static struct {
         {    1000000,     10 },     /* 1 Mbit/s */
         {   10000000,     10 },     
         {  100000000,    100 },
-        { 1000000000,    100 }      /* 1 Gbit/s */
+        { 1000000000,    100 },     /* 1 Gbit/s */
+        {10000000000,    100 },
+       {100000000000,    100 }
     };
 static int rateidx = 0, wantbiggerrate;
 
@@ -105,7 +107,7 @@ static float get_max_bandwidth() {
 }
 
 /* rate in bits */
-static int get_bar_length(const int rate) {
+static int get_bar_length(const long rate) {
     float l;
     if (rate <= 0)
         return 0;
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